I have Nuvi 1300 same problem, freezing on the Loading Maps. I tried this method but also freezing on the green progress. The problem was occurs when I copy a gmapsupp to internal memory in \garmin folder. I already tried to use GUPDATE.GCD and convert to GRN using GRN_Tool and change .img but still freezing. Any idea how to access internal memory so I can delete the corrupt map files? Thanks, Yunialdi